JP2007052629A - Plant information management system, plant information management method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plant information management system, a plant information management method and a program, wherein current trend data and reference trend data are superimposed sequentially correspondingly to each other even in a suspension period to improve operability and monitoring efficiency for improving operation of a plant. <P>SOLUTION: In this plant information management system 3, the current trend data showing a current operation state of the plant are collected, a current trend graph based on the current trend data and a reference trend graph based on the prepared reference trend data are superimposed and displayed on a screen of a display means. The plant information management system 3 has a trend editing means 14 removing the current trend data in a specific period from the current trend data, and serializing the current trend data at the start of the specific period and the current trend data at the end of the specific period. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plant information management system, a plant information management method, and a program for displaying a trend graph indicating an operation state of a plant.

  In recent years, the operation of a plant is controlled by a process control system (PCS: Process Control System) based on trend data collected from production processes of various parts of the plant and various electric appliances. As a process control system, a distributed control system (DCS) and a programmable controller (PLC) are known.

  As a technology for supporting plant operation control and analyzing the state of the plant, a reference trend data graph (hereinafter referred to as a reference trend graph) as a standard and a trend data graph (hereinafter referred to as a current trend graph) that is currently in operation. There is a plant information management system (PIMS; Plant Information Management System) that is displayed on the screen of the display means.

  By using this plant information management system, the reference trend graph and the current trend graph can be compared on the same screen, and the process control system is adapted to adapt the current operating state to the reference trend graph based on the comparison result. By performing this operation control, the optimum operation of the plant becomes possible.

  As reference trend data, the data which show a suitable operation pattern from the trend data (henceforth past history data) collected at the time of the operation of the past plant, for example are employ | adopted. The past trend data is stored in a database (DB) in storage means such as an HDD, and can be extracted by the search means.

In FIG. 6, an example of the system block diagram of the conventional plant information management system 1 is shown.
As shown in FIG. 6, the conventional plant information management system 1 receives process data including current trend data indicating the operation state of the plant and alarm and event data from the process control system 2 that performs operation control of the plant. Current trend data to be compared from the storage means 20 having the trend DB 21 in which past data to be compared with the collected current trend data and typical data set in advance are stored. Data (hereinafter referred to as reference trend data) is read and the reference trend graph based on the read reference trend data and the current trend graph based on the collected current trend data are superimposed and displayed as a superimposed trend graph Data collection means 11 to be displayed on means 40, search Stage 12, and a control means 10 having an overlay unit 13.

As described above, in order to match the start point of the current trend data with the start point of the reference trend data in the overlapping process of the current trend data and the reference trend data, for example, reference is made to the collected data (current trend data). On the time axis specified by the reference pattern display position specifying means for specifying the top display position of the reference pattern composed of the guide data (reference trend data) on the time axis of the trend graph and the reference pattern display position specifying means There is disclosed a trend graph display device provided with a reference pattern display means for displaying a reference pattern so that the head of the reference pattern is positioned at the designated position (see Patent Document 1).
JP-A-5-340770

  However, in the above conventional plant information management system, for example, when the operation of the plant is temporarily interrupted for some reason and then the reason for the interruption is resolved and the operation is restarted, or when there is no operator operating the plant information management system When an interruption period occurs, such as when an error occurs, the elapsed time of the reference trend data differs from the current trend data. Therefore, when the start time of the current trend data and the start time of the reference trend data are combined and superimposed, the current trend data after the interruption does not correspond to the reference trend data, and the current trend data at the time after the interruption When the data and the reference trend data are overlapped together, there is a problem that it is difficult to overlap the trend data because the current trend data before the interruption and the reference trend data do not correspond.

  The problem of the present invention is that even if there is an interruption period, the current trend data and the reference trend data are overlapped corresponding to each other in time series, and the operability and the monitoring efficiency for improving the operation of the plant are improved. A management system, a plant information management method, and a program are realized.

The invention according to claim 1 collects current trend data indicating the current operating state of the plant, and displays a current trend graph based on the current trend data and a reference trend graph based on reference trend data prepared in advance. In the plant information management system that is displayed superimposed on the screen of the means, the current trend data of a specific period is removed from the current trend data, the current trend data of the start time of the specific period, and the specific period It is characterized by being a plant information management system provided with a trend editing means that makes the current trend data at the end time continuous in time.
Furthermore, a program for causing a computer to function the main means shown in the invention described in claim 1 is provided (the invention described in claim 8).

  The invention described in claim 2 is characterized in that in the plant information management system according to claim 1, an operation means for receiving an instruction to set the specific period is provided.

  The invention according to claim 3 is the plant information management system according to claim 1 or 2, wherein the specific period is a period from the start time to the end time arbitrarily designated by a user. It is a feature.

  The invention according to claim 4 is the plant information management system according to any one of claims 1 to 3, wherein the specific period is a period in which the plant information management system does not monitor and manage the plant in advance. It is characterized by a set period.

  According to a fifth aspect of the present invention, in the plant information management system according to any one of the first to fourth aspects, the specific period is a period between two different phenomena occurring in the plant. It is characterized by.

  The invention according to claim 6 is the plant information management system according to any one of claims 1 to 5, wherein the specific period is two different phenomena that are identified in advance from a plurality of conditions in the plant. It is characterized by a period between conditions.

  The invention according to claim 7 collects current trend data indicating the current operating state of the plant, and displays a current trend graph based on the current trend data and a reference trend graph based on reference trend data prepared in advance. In the plant information management method, the current trend data for a specific period is removed from the current trend data, the current trend data at the start time of the specific period, and the specific period It is a plant information management method including a trend editing process in which current trend data at an end time is temporally continuous.

  According to the first, seventh, and eighth aspects of the present invention, even if there is an interruption period, the data of the specific period is removed from the current trend data with the interruption period as the specific period, and the start time of the specific period and Since the current trend data of the end time is joined so as to be continuous in time, the current trend graph based on the current trend data from which the current trend data of a specific period has been removed and the reference trend graph are superimposed and superimposed. It can be displayed on the screen of the display means as a trend graph. Therefore, the reference trend graph after the elapse of the specific period does not become a graph advanced by the time of the specific period than the current trend graph, and the current trend graph and the reference trend graph can be compared even at the time after the specific period. Since an overlay trend graph that can be displayed can be displayed, the operability and monitoring efficiency of the plant can be improved.

  According to the second aspect of the present invention, it is possible to obtain the same effect as that of the first aspect of the invention. Since the period for removing the current trend data can be arbitrarily set, convenience and operability can be improved.

  According to the third aspect of the invention, the same effect as in the first or second aspect can be obtained, and the specific period is a period from the start time to the end time arbitrarily designated by the user. Thus, the period for removing the current trend data can be set according to the trend of the user (operator who operates the plant information management system), so that convenience and operability can be improved.

  According to the invention described in claim 4, the plant information management system performs the monitoring and management of the plant in advance for a specific period as well as the same effect as in any one of claims 1 to 3. Since there is no set period, the current trend data is removed without an instruction from the user (operator operating the plant information management system), so that convenience can be improved.

  According to the invention described in claim 5, the same effect as in any one of claims 1 to 4 can be obtained, but the specific period is a period between two different phenomena occurring in the plant. As a result, the current trend data is removed in accordance with a phenomenon occurring in the plant without an instruction from a user (an operator who operates the plant information management system), so that convenience can be improved.

  According to the sixth aspect of the present invention, the same effect as in any one of the first to fifth aspects can be obtained, but also the phenomenon in which the specific period is identified in advance from a plurality of conditions in the plant is different. Because it is the period between the two conditions, the current trend data is removed according to the condition of the phenomenon that occurred in the plant without the instruction of the user (operator operating the plant information management system), improving convenience Can be made.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. The embodiment of the present invention shows the most preferable mode of the present invention, and the terminology of the present invention is not limited to this.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the configuration will be described.

In FIG. 1, the system block diagram of the plant information management system 3 in this Embodiment is shown.
In addition, the same code | symbol is attached | subjected to the location similar to the conventional plant information management system 1. FIG.

  The process control system 2 is a system that controls plant production processes such as power generation, petroleum refining, steel, and gas, and various electrical equipment. For example, a distributed control system (DCS) or a programmable controller (PLC) ; Programmable Logic Controller).

  The plant information management system 3 is a system for collecting process data from the process control system 2 and for supporting operation control of the process control system 2 and analyzing a state of the plant based on the collected process data.

  The process data collected from the process control system 2 includes data indicating the operation state of the plant (current trend data) and alarm and event data.

  Alarm and event data are alarms that notify you of abnormal conditions or important phenomena in the production process to be monitored and the operating status of various devices, and data that indicates that a particular phenomenon has occurred when a specific phenomenon occurs And data on the phenomenon that occurred.

FIG. 2 shows an example of alarm and event data.
Alarm and event data can be classified into a plurality of types. The types of alarm and event data can be classified into data for the phenomenon that occurred (for example, process alarm), data that indicates a predetermined processing state (for example, batch status), and so on. Classification can be made based on various conditions that specify alarm and event data such as location and contents of the state.

  For example, if the alarm and event data are “process alarm, tag 1, HI”, the type of alarm and event data is a process alarm, and the temperature of the temperature sensor corresponding to tag 1 has exceeded the upper limit. means. The tag indicates a field device including a measuring device such as a temperature sensor, a pressure sensor, and a flow rate sensor, an adjusting device such as a valve opening / closing circuit and a thermal power adjusting device.

  The alarm and event data is preferably data that conforms to the OPC (OLE for Process Control) Foundation standard.

  As shown in FIG. 1, the plant information management system 3 in the present embodiment is connected to the process control system 2 so as to be communicable, and includes a control means 60, a storage means 70, an operation means 30, a display means 40, an external I / F50 is provided, and each part is electrically connected.

  The control means 60 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and a system program, various control programs, and various data stored in the storage means 70 and the ROM. Etc. are expanded in the RAM, and the overall operation of the plant information management system 3 is comprehensively controlled by cooperation with these programs and data. Further, the control means 60 executes various processes according to the program expanded in the RAM, stores the processing results in the RAM or the storage means 70, and causes the display means 40 to display them.

  The control means 60 expands the program and data stored in the ROM and various data stored in the storage means 70 to the RAM etc. by cooperation of each unit such as the CPU, ROM, RAM, and storage means. 30 and the data collection means 11 for collecting the current trend data indicating the current operation state of the plant via the external I / F 50 according to various data input from the process control system 2 and the collected current trend data The search means 12 for reading the reference trend data to be compared with the current trend data from the storage means 70 having the trend DB 21 in which the past data to be processed and typical data set in advance are stored, and read Reference trend graph based on reference trend data and current trend data based on collected current trend data And superposing the trend graph, it realizes a function as a superposition unit 13 to be displayed on the display unit 40 as superimposed trend graph.

  In addition, the control unit 60 is configured to display current trend data corresponding to a specific period, that is, a specified period specified by the operation unit 30, an operation stop period stored in advance in the storage unit 20, or a period based on the removal start / end condition. The current trend data at the start time of the specific period and the current trend data at the end time of the specific period are temporally continuous with respect to the current trend data from which the current trend data corresponding to the specific period has been removed. Thus, the function as the trend editing means 14 to be joined is realized.

  The storage means 70 includes an electrically erasable and rewritable nonvolatile storage medium, and a trend DB 21, an operation stop period DB 22, and a removal start / end condition DB 23 are stored in the storage medium. Nonvolatile storage media that can be electrically erased and rewritten include, for example, HDD (Hard Disk Drive), EEPROM (Electrically Erasable and Programmable ROM), flash memory, and the like.

  The trend DB 21 is the past trend data indicating the operation state of the plant collected from the process control system 2 via the external I / F 50 in the past, the current trend data, and typical data indicating the preset operation state of the plant ( Standard trend data) is stored.

  The operation stop period DB 22 stores a plurality of preset periods (operation stop periods) in which the plant information management system 3 does not monitor and manage the process control system 2 as specific periods. Examples of the operation stop period include a lunch break period of an operator who operates the plant information management system 3 by using a calendar function, a night time, and the like.

  As described above, since the operation stop period is stored as the specific period, the current trend data is removed without an instruction from the user (an operator who operates the plant information management system), so that convenience can be improved. .

  The removal start / end condition DB 23 stores a plurality of sets of removal start conditions and removal end conditions for removing current trend data. In the removal start / end condition DB 23, two different phenomena occurring in the process control system 2, that is, two different types of alarm and event data are set as the removal start condition and the removal end condition, and the process control system There are cases where two conditions having different phenomena that are identified in advance from a plurality of conditions that occur in 2, that is, two different conditions that specify alarm and event data are set as the removal start condition and the removal end condition. The specific period is from the time when the alarm and event data meet the removal start condition to the time when the alarm and event data meet the removal end condition.

  In this way, the specific period is a period between two different phenomena that have occurred in the plant or a period between two conditions that have different phenomena that are identified in advance from a plurality of conditions that occur in the plant. Since the current trend data is removed in accordance with a phenomenon occurring in the process control system without an instruction from an operator who operates the information management system, the convenience can be improved.

FIG. 3 shows an example of the removal start / end condition DB 23.
As shown in FIG. 3, a plurality of records indicating the removal start / end conditions including the removal start condition and the removal end condition corresponding to the removal start condition are stored.

  The removal start condition of the record indicated by 231 shown in FIG. 3 is set to “process alarm, tag 1, HI”, and the removal end condition is set to “process alarm, tag 1, HI return”. In other words, the removal start condition is a process alarm when the temperature of the temperature sensor corresponding to the tag 1 exceeds the upper limit value, and the temperature of the temperature sensor corresponding to the tag 1 that is a process alarm returns to the upper limit value. This indicates that the removal end condition is satisfied. Therefore, in the record indicated by 231 shown in FIG. 3, all the conditions for specifying the alarm and event data are specified, and the alarm and event data as different phenomena are set in the removal start condition and the removal end condition. Yes.

  The removal start condition of the record indicated by 232 shown in FIG. 3 is set to “batch status, temporary stop”, and the removal end condition is set to “batch status, restart operation”. That is, the type of alarm and event data is batch status, and the removal start condition is when the alarm and event data are paused regardless of the place of occurrence. The type of alarm and event data is batch status, and operation is possible regardless of the place of occurrence. The case where it is resumed indicates that the removal end condition is satisfied. Therefore, in the record indicated by 232 in FIG. 3, not all conditions for specifying alarm and event data are specified, but alarm and event data classified from a plurality of conditions are set as a removal start condition and a removal end condition. Has been.

  The operation unit 30 includes a keyboard having cursor keys, numeric input keys, various function keys, and the like, a mouse as a pointing device, a touch panel provided so as to cover the display screen of the display unit, and the like. The pressed signal that is pressed is output to the control unit 60 and an operation signal from the mouse is output to the operation unit 60.

  Further, the operation means 30 realizes a function of accepting a setting instruction for a specific period. The specific period accepted by the operating means 30 is a designated period arbitrarily set by an operator who operates the plant information management system 3, for example, an irregular meeting for a user (an operator who operates the plant information management system), etc. The period during which the operation of the plant information management system 3 could not be performed because of attending the event.

  As described above, by providing an operation unit that receives an instruction to set a specified period as a specific period, an operator operating the plant information management system can arbitrarily set a period during which current trend data is removed. And operability can be improved.

  During the period from the time when the alarm and event data collected together with the current trend data as the plant data to the removal start condition to the time when it meets the removal end condition, the process control system is operating. The period is suspended for some reason and then resumed after the reason for interruption is resolved, or the period during which the operator operating the plant information management system is absent, corresponds to a specific period.

  The display means 40 is composed of, for example, an LCD (Liquid Crystal Display), an EL (Electro Luminescence) display, etc., and displays various information on the display screen in accordance with a display instruction input from the control means 60, and a superposition trend. Implement the function to display the graph.

  The external I / F 50 is an interface for connecting to the process control system 2 in a communicable manner, and adjusts the data transfer rate and converts the data format between the plant information management system 3 and the process control system 2. , Mediate the exchange of data between the two. The external I / F 50 is preferably an interface that conforms to the OPC Foundation regulations, which is a unified specification for inter-application communication interfaces.

Next, the operation of the present embodiment will be described.
FIG. 4 shows a flowchart of trend data overlay processing in the present embodiment. The trend data superimposing process shown in FIG. 4 is realized by software processing based on the cooperation of the CPU included in the control means 60, the programs stored in the ROM and RAM, various data, and various data stored in the storage means 70. Is done.

  As a precondition, it is assumed that reference trend data as a comparison target of current trend data is read from the trend DB 21 of the storage unit 70 based on an instruction to search for reference trend data received by the operation unit 30.

  Process data including the latest current trend data and alarm and event data is collected from the process control system 2 connected via the external I / F 50, and the collected process data is stored in the storage means 70 and collected. The latest current trend data is updated as current trend data (step S1).

  It is determined whether or not a setting period setting instruction has been received by the operating unit 30 (step S2). If it is determined that a setting period setting instruction has been received (step S2; Yes), the instructed specified period is specified. A period is set (step S3).

  The start time of the specified period set as the specific period is set as the start time (removal start time) of the specific period, and the end time is set as the end time (removal end time) of the specific period.

  When it is determined that the instruction for setting the instruction period has not been received (step S2; No), it is determined whether or not the removal start flag is in an ON state (step S4).

  The removal start flag is turned ON when the alarm and event data collected together with the current trend data meets any of the removal start conditions in the removal start / end condition DB 23, and the removal start flag is turned ON. When the removal end condition corresponding to the removal start condition is satisfied, the flag is turned OFF, and when the current trend data elapsed time is the designated start time of the operation stop period in the operation stop period DB22. If the removal start flag is an end time corresponding to the start time when the removal start flag is turned on, the flag is turned off.

  When it is determined that the removal start flag is in the ON state (step S4; Yes), when the removal start flag is in the ON state based on the removal start condition, the removal end condition corresponding to the removal start condition is met. If the removal start flag is in the ON state based on the start time of the operation stop period, it is determined whether or not the end time corresponding to the start time has elapsed (step S5). ).

  When it is determined that the alarm and event data do not conform to the removal end condition corresponding to the removal start condition in which the removal start flag is turned ON, it is determined that the end time corresponding to the start time has not elapsed. If (step S5; No), the process proceeds to step S14.

  When it is determined that the alarm and event data conforms to the removal end condition corresponding to the removal start condition in which the removal start flag is ON, or the time of the end time corresponding to the start time has elapsed When it is determined (step S5; Yes), the removal end time is set as the time when the removal end condition is met or the end time of the operation stop period (step S6).

  After the removal end time is set (after step S6), the specific period is set from the removal start time to the removal end time (step S7).

  When it is determined that the removal start flag is not in the ON state (that is, the removal start flag is in the OFF state) (step S4; No), the removal start / end condition DB 23 is referred to for the alarm and event data, and the removal start condition It is determined whether or not the current trend data is in compliance with any one of the above, or whether or not the current trend data time has elapsed from the start time of any of the operation stop periods by referring to the operation stop period DB22 ( Step S8).

  The alarm and event data refer to the removal start / end condition DB 23 and are not adapted to any of the removal start conditions, or the operation stop period DB 22 is referred to and the time of the current trend data is in any operation stop period. When it is determined that the start time has not elapsed (step S8; No), the process proceeds to step S14.

  For alarm and event data, the removal start / end condition DB 23 is referred to conform to one of the removal start conditions, or the operation stop period DB 22 is referred to and the elapsed time of the current trend data is any of the operation stop If it is determined that the time has elapsed from the start time of the period (step S8; Yes), the removal start flag is set to the ON state (step S9).

  After the removal start flag is set to the ON state (after step S9), the removal start time is set as the time when the removal start condition is met or the start time of the operation stop period (step S10), and the process proceeds to step S14.

  On the other hand, after the specific period is set (after step S3 or step S7), the current trend data corresponding to the set specific period is removed, and the current trend data from which the data corresponding to the specific period is removed, An editing process is performed in which the current trend data at the removal start time and the current trend data at the removal end time are joined so as to be temporally continuous (step S11).

  The current trend data that is joined after the current trend data for a specific period is removed is updated as the current trend data (step S12), and the removal start flag is set to the OFF state (step S13).

  Step S5; After No, Step S8; After No, after Step S10 or after Step S13, a current trend graph is generated based on the current trend data, and a reference trend graph is generated based on the reference trend data. The superposition processing of the current trend graph and the reference trend graph is executed to generate a superposition trend graph (step S14), and the generated superposition trend graph is displayed on the display screen of the display means 40 (step S14). S15).

  After the superimposed trend graph is displayed (after step S16), it is determined whether or not an end instruction for this process has been received by the operation means 30 (step S16), and it is determined that an end instruction has not been received. (Step S16; No), the process returns to Step S1, and when it is determined that an end instruction has been accepted (Step S16; No), this process is ended.

  FIG. 5 shows an example of the overlay trend graph. The superimposed trend graph shown in FIG. 5 (a) is an example of the superimposed trend graph before application of the present invention, and the superimposed trend graph shown in FIG. 5 (b) is an overlay trend graph after application of the present invention. It is an example.

  The superimposed trend graph shown in FIG. 5 is a graph in which a graph based on current trend data in which the vertical axis is set as temperature and the horizontal axis is set as time is superimposed on a graph based on reference trend data.

  For example, an operator who operates the plant information management system 3 monitors and manages the temperature trend of the process control system 2 so that the current trend graph follows the reference trend graph while viewing the superimposed trend graph shown in FIG. be able to.

  The solid line shown in FIG. 5A indicates the current trend graph A1, and the broken line indicates the reference trend graph B. As shown in FIG. 5 (a), when the period from the time ts to the time te becomes the specific period T, the plant cannot be monitored and managed during the specific period T. The reference trend graph B on the premise that there is a current trend graph A1 that is not in the operation monitoring and management state is displayed, and the current trend data A1 cannot be compared with the reference trend data B. Further, the reference trend graph B after the elapse of the specific period T (after the time te) is a graph showing data advanced by the time of the specific period T from the current trend graph A1, and therefore, the current trend data A1 is referred to at a certain time. The trend data B cannot be compared.

  When the present invention is applied to FIG. 5A, the specific period T shown in FIG. 5A is removed from the specified period, operation stop period, alarm and event data described above from the time when the removal start condition is applied. Corresponding to one of the periods up to the time when the condition is applied, the time ts corresponds to the removal start time, and the time te corresponds to the removal end time.

  The solid line shown in FIG. 5B is obtained by removing the current trend data for a specific period T from the current trend graph A1 shown in FIG. 5A, and the current trend data at time ts and the current trend data at time te. A current trend graph A2 joined and graphed in a continuous manner in time is shown, and a broken line shows a reference trend graph B.

  As shown in FIG. 5 (b), the current trend graph A2 is a reference trend based on the assumption that it is in the operation monitoring and management state because the specific period T during which the plant cannot be monitored and managed is removed. The graph B and the current trend graph that is not in the operation monitoring and management state are not displayed, and the reference trend graph B after the specific period T (after time te) advances by the time of the interruption period T from the current trend graph. The current trend data A2 and the reference trend data B can be compared even at a time after the time te.

  As described above, according to the present embodiment, even when there is an interruption period, the data of the specific period is removed from the current trend data using the interruption period as the specific period, and the start time and end time of the specific period The current trend data of the specified period is joined so that it is continuous in time, so the current trend graph based on the current trend data from which the current trend data for a specific period has been removed and the reference trend graph are superimposed, and the superimposed trend graph Can be displayed on the screen of the display means. Therefore, the reference trend graph after the specified period has not progressed by the time of the specified period from the current trend graph, and the current trend graph and the reference trend graph are time-sequentially even at times after the specified period. Since it can superimpose correspondingly, the operativity and monitoring efficiency of a plant can be aimed at.

It is a system configuration figure of plant information management system 3 in this embodiment. It is an example of an alarm and event data. It is an example of removal start / end condition DB23. It is a flowchart of the overlay process of the trend data in this Embodiment. It is an example of an overlay trend graph. It is an example of the system block diagram of the conventional plant information management system 1. FIG.

Explanation of symbols

1, 3 Plant information management system 2 Process control system 10, 60 Control means 11 Data collection means 12 Search means 13 Overlay means 14 Trend editing means 20, 70 Storage means 21 Trend DB
22 Operation stoppage period DB22
23 Removal start / end condition DB
30 Operating means 40 Display means 50 External I / F
A1, A2 Current trend data B Reference trend data

Claims (8)

Collects current trend data indicating the current operating state of the plant, displays the current trend graph based on the current trend data and the reference trend graph based on the reference trend data prepared in advance on the display means screen. In the plant information management system designed to
A trend editing unit that removes current trend data for a specific period from the current trend data, and temporally continues current trend data for a start time of the specific period and current trend data for an end time of the specific period; thing,
A plant information management system characterized by Comprising an operation means for receiving a setting instruction for the specific period;
The plant information management system according to claim 1. The specific period is
It is a period from the start time arbitrarily specified by the user to the end time,
The plant information management system according to claim 1 or 2. The specific period is
The plant information management system is a preset period in which the plant is not monitored and managed;
The plant information management system according to any one of claims 1 to 3. The specific period is
A period between two different phenomena that occurred in the plant,
The plant information management system according to any one of claims 1 to 4. The specific period is
A period between two conditions having different phenomena that are identified in advance from a plurality of conditions in the plant;
The plant information management system according to any one of claims 1 to 5, wherein Collects current trend data indicating the current operating state of the plant, displays the current trend graph based on the current trend data and the reference trend graph based on the reference trend data prepared in advance on the display means screen. In the plant information management method,
Including a trend editing step of removing current trend data for a specific period from the current trend data, and making the current trend data at the start time of the specific period and the current trend data at the end time of the specific period temporally continuous ,
A plant information management method characterized by the above. Computer
Collects current trend data indicating the current operating state of the plant, and displays the current trend graph based on the current trend data and the reference trend graph based on reference trend data prepared in advance on the screen of the display means. In a program that lets you function
The current trend data for a specific period is removed from the current trend data, and the current trend data at the start time of the specific period and the current trend data at the end time of the specific period are functioned as a trend editing unit that continues in time. thing,
A program characterized by

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